Dead leopard sharks washing up on Alameda Beach, California – about 100 in San Francisco Bay this year

The leopard sharks are infected by a parasite that goes to their brains. A shark die-off in San Francisco Bay is being blamed on a parasite in the water. Bay currents are pushing the carcasses ashore at Crown Beach. So far this year, about 100 leopard sharks have washed up onto beaches around the area, not just in Alameda.